A data transmission method and an apparatus in a network supporting coordinated multipoint transmission are provided. The method includes transmitting candidate sets of initial state information used to generate Demodulation Reference Signal (DMRS) scrambling sequences for the transmission points to the UE, and transmitting an indication corresponding to at least one candidate set of initial state information respectively associated with at least one transmission point to the UE, wherein the initial state information is used by the UE to generate DMRS scrambling sequences.
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1. A data transmission method for a base station (BS), the data transmission method comprising: transmitting a plurality of identifiers to generate a reference signal sequence to a user equipment (UE); transmitting an indication indicating one of the plurality of identifiers to the UE; generating a reference signal based on the indicated identifier; and transmitting data and the generated reference signal to the UE.
A base station (BS) transmits multiple identifiers to a user equipment (UE). These identifiers are used to generate a reference signal sequence. The BS also transmits an indication signal to the UE that specifies which of the multiple identifiers should be used. The BS then generates a reference signal using the indicated identifier and transmits both data and the generated reference signal to the UE. This allows the UE to properly decode the data.
2. The data transmission method of claim 1 , wherein the indication indicates at least one of a set of antenna ports, a scrambling identity (SCID), or a number of layers, and wherein the SCID indicates one of the plurality of identifiers.
In the data transmission method where a base station (BS) transmits multiple identifiers and an indication of which identifier to use to a user equipment (UE), the indication can specify a set of antenna ports, a scrambling identity (SCID), or the number of layers being used for transmission. The scrambling identity (SCID) is one of the identifiers transmitted initially. The BS then generates a reference signal using the indicated identifier and transmits both data and the generated reference signal to the UE.
3. The data transmission method of claim 1 , wherein the plurality of identifiers are sent to the UE on higher layer signaling, and wherein the indication is sent to the UE on a physical downlink control channel (PDCCH) or an enhanced-PDCCH (E-PDCCH).
In the data transmission method where a base station (BS) transmits multiple identifiers and an indication of which identifier to use to a user equipment (UE), the multiple identifiers are sent to the UE using higher-layer signaling (e.g., RRC signaling). The indication of which identifier to use is sent to the UE via a physical downlink control channel (PDCCH) or an enhanced PDCCH (E-PDCCH), enabling faster, more dynamic selection of the identifier. The BS then generates a reference signal using the indicated identifier and transmits both data and the generated reference signal to the UE.
4. The data transmission method of claim 1 , wherein the indicated identifier is used for generating the reference signal by the UE.
In the data transmission method where a base station (BS) transmits multiple identifiers and an indication of which identifier to use to a user equipment (UE), the identifier indicated by the BS is used by the UE to generate its own reference signal. This allows the UE to properly decode the data transmitted from the BS. The BS generates a reference signal using the indicated identifier and transmits both data and the generated reference signal to the UE.
5. The data transmission method of claim 1 , wherein a length of the indication is 3 bits.
In the data transmission method where a base station (BS) transmits multiple identifiers and an indication of which identifier to use to a user equipment (UE), the indication, which specifies the particular identifier, is 3 bits long. This allows for the selection of up to 8 different identifiers. The BS then generates a reference signal using the indicated identifier and transmits both data and the generated reference signal to the UE.
6. A data reception method for a user equipment (UE), the data reception method comprising: receiving, from a base station (BS), a plurality of cell identifiers used to generate a reference signal sequence; receiving, from the BS, an indication indicating one of the plurality of identifiers; generating a reference signal based on the indicated identifier; and decoding data using the generated reference signal.
A user equipment (UE) receives multiple identifiers from a base station (BS). These identifiers are used to generate a reference signal sequence. The UE also receives an indication signal from the BS that specifies which of the multiple identifiers should be used. The UE then generates a reference signal using the indicated identifier and decodes the data received from the BS using the generated reference signal.
7. The data reception method of claim 6 , wherein the indication indicates at least one of a set of antenna ports, a scrambling identity (SCID), or a number of layers, and wherein the SCID indicates one of the plurality of identifiers.
In the data reception method where a user equipment (UE) receives multiple identifiers and an indication of which identifier to use from a base station (BS), the indication can specify a set of antenna ports, a scrambling identity (SCID), or the number of layers being used for transmission. The scrambling identity (SCID) is one of the identifiers received initially. The UE then generates a reference signal using the indicated identifier and decodes the data received from the BS using the generated reference signal.
8. The data reception method of claim 6 , wherein the plurality of identifiers are sent to the UE on higher layer signaling, and wherein the indication is sent to the UE on a physical downlink control channel (PDCCH) or an enhanced-PDCCH (E-PDCCH).
In the data reception method where a user equipment (UE) receives multiple identifiers and an indication of which identifier to use from a base station (BS), the multiple identifiers are received by the UE using higher-layer signaling (e.g., RRC signaling). The indication of which identifier to use is received by the UE via a physical downlink control channel (PDCCH) or an enhanced PDCCH (E-PDCCH), enabling faster, more dynamic selection of the identifier. The UE then generates a reference signal using the indicated identifier and decodes the data received from the BS using the generated reference signal.
9. The data reception method of claim 6 , wherein the indicated identifier is used for generating the reference signal by the UE.
In the data reception method where a user equipment (UE) receives multiple identifiers and an indication of which identifier to use from a base station (BS), the identifier indicated by the BS is used by the UE to generate its own reference signal. This allows the UE to properly decode the data transmitted from the BS. The UE then decodes the data received from the BS using the generated reference signal.
10. The data reception method of claim 6 , wherein a length of the indication is 3 bits.
In the data reception method where a user equipment (UE) receives multiple identifiers and an indication of which identifier to use from a base station (BS), the indication, which specifies the particular identifier, is 3 bits long. This allows for the selection of up to 8 different identifiers. The UE then generates a reference signal using the indicated identifier and decodes the data received from the BS using the generated reference signal.
11. The data reception method of claim 6 , further comprising: receiving the data and a reference signal generated based on the indicated identifier by the BS.
In the data reception method where a user equipment (UE) receives multiple identifiers and an indication of which identifier to use from a base station (BS), the UE also receives data and a reference signal. The reference signal received was generated by the BS based on the indicated identifier. The UE then generates a reference signal using the indicated identifier and decodes the data received from the BS using the generated reference signal.
12. A base station (BS) for data transmission, the BS comprising: a transceiver configured to transmit and receive a signal; and at least one processor configured to: control to transmit a plurality of identifiers to generate a reference signal sequence to a user equipment (UE), transmit an indication indicating one of the plurality of identifiers to the UE, generate a reference signal based on the indicated identifier, and transmit data and the generated reference signal to the UE.
A base station (BS) is designed to transmit data. It has a transceiver for sending and receiving signals and a processor. The processor is configured to transmit multiple identifiers to a user equipment (UE) for reference signal generation. The processor also transmits an indication of which identifier the UE should use. The BS generates a reference signal based on the indicated identifier and then transmits both the data and the generated reference signal to the UE.
13. The BS of claim 12 , wherein the indication indicates at least one of a set of antenna ports, a scrambling identity (SCID), or a number of layers, and wherein the SCID indicates one of the plurality of identifiers.
The base station (BS) which transmits multiple identifiers and an indication of which identifier to use to a user equipment (UE), the indication can specify a set of antenna ports, a scrambling identity (SCID), or the number of layers being used for transmission. The scrambling identity (SCID) is one of the identifiers transmitted initially. The BS then generates a reference signal using the indicated identifier and transmits both data and the generated reference signal to the UE.
14. The BS of claim 12 , wherein the plurality of identifiers are sent to the UE on higher layer signaling, and wherein the indication is sent to the UE on a physical downlink control channel (PDCCH) or an enhanced-PDCCH (E-PDCCH).
The base station (BS) which transmits multiple identifiers and an indication of which identifier to use to a user equipment (UE), transmits the multiple identifiers to the UE using higher-layer signaling (e.g., RRC signaling). The indication of which identifier to use is sent to the UE via a physical downlink control channel (PDCCH) or an enhanced PDCCH (E-PDCCH), enabling faster, more dynamic selection of the identifier. The BS then generates a reference signal using the indicated identifier and transmits both data and the generated reference signal to the UE.
15. The BS of claim 12 , wherein the indicated identifier is used for generating the reference signal by the UE.
The base station (BS) which transmits multiple identifiers and an indication of which identifier to use to a user equipment (UE), sends an identifier that is subsequently used by the UE to generate its reference signal. This helps the UE to properly decode data. The BS generates a reference signal using the indicated identifier and transmits both data and the generated reference signal to the UE.
16. The BS of claim 12 , wherein the indication includes 3 bits information.
The base station (BS) which transmits multiple identifiers and an indication of which identifier to use to a user equipment (UE), sends an indication signal that is 3 bits long. This allows the indication to select one of up to 8 identifiers. The BS then generates a reference signal using the indicated identifier and transmits both data and the generated reference signal to the UE.
17. A user equipment (UE) for data reception, the UE comprising: a transceiver configured to transmit and receive a signal; and at least one processor configured to: receive, from a base station (BS), a plurality of cell identifiers used to generate a reference signal sequence, receive, from the BS, an indication indicating one of the plurality of identifiers, generate a reference signal based on the indicated identifier, and decode data using the generated reference signal.
A user equipment (UE) is designed to receive data. It has a transceiver for sending and receiving signals and a processor. The processor is configured to receive multiple identifiers from a base station (BS) that are used for reference signal sequence generation. It also receives an indication signal from the BS indicating which of the identifiers to use. The UE generates a reference signal using the indicated identifier and decodes data using the generated reference signal.
18. The UE of claim 17 , wherein the indication indicates at least one of a set of antenna ports, a scrambling identity (SCID), or a number of layers, and wherein the SCID indicates one of the plurality of identifiers.
The user equipment (UE) which receives multiple identifiers and an indication of which identifier to use from a base station (BS), receives an indication that specifies a set of antenna ports, a scrambling identity (SCID), or the number of layers being used for transmission. The scrambling identity (SCID) is one of the identifiers received initially. The UE then generates a reference signal using the indicated identifier and decodes the data received from the BS using the generated reference signal.
19. The UE of claim 17 , wherein the plurality of identifiers are sent to the UE on higher layer signaling, and wherein the indication is sent to the UE on a physical downlink control channel (PDCCH) or an enhanced-PDCCH (E-PDCCH).
The user equipment (UE) which receives multiple identifiers and an indication of which identifier to use from a base station (BS), receives the multiple identifiers from the BS using higher-layer signaling (e.g., RRC signaling). The indication of which identifier to use is received from the BS via a physical downlink control channel (PDCCH) or an enhanced PDCCH (E-PDCCH), enabling faster, more dynamic selection of the identifier. The UE then generates a reference signal using the indicated identifier and decodes the data received from the BS using the generated reference signal.
20. The UE of claim 17 , wherein the indicated identifier is used for generating the reference signal by the UE.
The user equipment (UE) which receives multiple identifiers and an indication of which identifier to use from a base station (BS), receives an identifier that is subsequently used by the UE to generate its reference signal. This identifier is indicated by the BS. The UE then decodes the data received from the BS using the generated reference signal.
21. The UE of claim 17 , wherein a length of the indication is 3 bits.
The user equipment (UE) which receives multiple identifiers and an indication of which identifier to use from a base station (BS), receives an indication signal that is 3 bits long. This allows the indication to select one of up to 8 identifiers. The UE then generates a reference signal using the indicated identifier and decodes the data received from the BS using the generated reference signal.
22. The UE of claim 17 , wherein the at least one processor is further configured to receive the data and a reference signal generated based on the indicated identifier by the BS.
The user equipment (UE) which receives multiple identifiers and an indication of which identifier to use from a base station (BS), also receives data and a reference signal generated by the BS using the indicated identifier. The UE then generates a reference signal using the indicated identifier and decodes the data received from the BS using the generated reference signal.
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April 15, 2015
August 1, 2017
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